Kegong Dong

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This article gives the absolute calibration of two types phosphor screens (DRZ) that were used to detect and characterize electron bunches driven by laser-plasma accelerator. The test was performed with picoseconds electron bunch at a radio frequency linear electron accelerator in Tsinghua University. The photons emitted from DRZ screens showed good linear(More)
Electrons can be efficiently injected into a plasma wave by colliding two counterpropagating laser pulses in a laser wakefield acceleration. However, the generation of a high-quality electron beam with a large charge is difficult in the traditional on-axis colliding scheme due to the growth of the electron beam duration coming from the increase of the beam(More)
The integrating current transformer (ICT) is a magnetic sensor widely used to precisely measure the charge of an ultra-short-pulse charged particle beam generated by traditional accelerators and new laser-plasma particle accelerators. In this paper, we present a new method to calculate the beam charge in an ICT based on circuit analysis. The output transfer(More)
The quasi-monochromatic Kα source based on the intense ultra short pulse laser is one of the attractive research topics in the short pulse laser applications. Using relatively simple setup, it is possible to produce bright hard x-ray line emission from several keV to a few tens keV with sub-ps pulse duration[1] and ~10 micrometer source size[2]. This ultra(More)
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